force-disable the GIL on free-threaded Mac CI

Author: ngoldbaum

.github/workflows/tests.yml

@@ -86,5 +86,11 @@ jobs:
       - name: Install dependencies
         run: python -m pip install tox
 
+      # TODO: remove when the _fsevents C extension declares support for
+      #       running without the GIL
+      - name: Force-disable the GIL on Mac
+        if: ${{ endsWith(matrix.python, 't') && matrix.os.matrix == 'macos' }}
+        run: echo "PYTHON_GIL=0" >> $GITHUB_ENV
+
       - name: Run tests
         run: python -m tox -q -e py